I was going to say that these and any of the other suggestions are not suitable for flip flops but it appears that you'll be using shoes in the future.

These Nashbar (and similar track-style) pedals could make your feet sore, even in regular shoes, because of the limited contact area - you'd be best to wait until you have stiff-soled shoes for these. Mallet-style pedals, like many of the suggestions above would be better but, because of the "sharp" points to prevent you from slipping off, make sure you have a decent sole between your foot and the pedal.

You could consider a hybrid, a mallet-style pedal with a clipless cleat so you could switch between the 2 (an example would be the Mallets from Crank Brothers, http://www.crankbrothers.com/pedals_mallet.php). Although you might not think that 2mi is sufficient distance to invest in clipless, I disagree, I often go on short runs/rides with the bike and benefit from the tight contact between my feet and the bike. Furthermore, bike shoes are stiff and help with the pedalling action and secondly, hybrid pedals would allow you to switch to clipless when you feel you'd like to without buying a second set of pedals or having to install/uninstall.